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CVE-2026-74636: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: tracing: Fix race between update_event_fields and, event_define_fields The following sequence may leads race between event_define_fields() and update_event_fields(): CPU0 (loads module A) CPU1 (loads module B) =============================== =============================== load_module(A) load_module(B) notifier_call_chain notifier_call_chain trace_module_notify trace_module_notify mutex_lock(&event_mutex) trace_event_update_all() trace_module_add_events(A) down_write(&trace_event_sem) __register_event(call_A) __add_event_to_tracers(call_A) event_define_fields(call_A) for each f: list_for_each_entry(field, list_add(&f->link, &class->fields, link) &class->fields) field = class->fields->next; Where access to the class->fields is not protected by the event_mutex in trace_event_update_all(). This produces the following panic: Unable to handle kernel access ... at virtual address 0000000000000018 pc : update_event_fields+0xf8/0x368 Call trace: update_event_fields+0xf8/0x368 trace_event_update_all+0x7c/0x2b4 trace_module_notify+0x4c/0x1dc notifier_call_chain+0x84/0x168 blocking_notifier_call_chain_robust+0x64/0xd4 load_module+0x10c8/0x123c __arm64_sys_finit_module+0x230/0x31c Fix by taking event_mutex in trace_event_update_all() before trace_event_sem.

    Засегнати продукти

    • Linux Linux: 7c6bd60999f32138e3b73fd97ea11ef47a94de25 преди 4e39f7b4d9d36508c53e89e6cbc640728df870b5; b3bc8547d3be60898818885f5bf22d0a62e2eb48 преди a30d421468300b1e7b2f233136aeb2db8013f555; b3bc8547d3be60898818885f5bf22d0a62e2eb48 преди e5f1d301b4bdaa4206db251fdc691f623162b0a8; b3bc8547d3be60898818885f5bf22d0a62e2eb48 преди fdeb190b0905a6aaed1e5d6adfb8613214748d7d; b3bc8547d3be60898818885f5bf22d0a62e2eb48 преди ed49684e69f846bf50b5050651ccdb87cfd152c0; b3bc8547d3be60898818885f5bf22d0a62e2eb48 преди f128740f39ab28d1f4ad5bdd10f3e117eec0c374; b3bc8547d3be60898818885f5bf22d0a62e2eb48 преди c3730b8373bb5059d735509b9e6a00d7eb337d7c; 55defdf935fab9f2989a197aae1042c082d9a343; 0c53a5c80e6e286733381a1d9f255ba4039e2e45; 5.15.33 преди 5.15.216; 5.16.19 преди 5.17; 5.17.2 преди 5.18
    • Linux Linux: 5.18; преди 5.18; 5.15.216 до 5.15.*; 6.1.183 до 6.1.*; 6.6.152 до 6.6.*; 6.12.104 до 6.12.*; 6.18.45 до 6.18.*; 7.1.9 до 7.1.*; от 7.2 нататък

    История

    • 22 август 2026 Публикувано

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    Първоизточници

    CVE-2026-74636: Linux | freedomonline.bg